Oxalate molecule as the trap for gamma-irradiation energy in the amorphous aluminosilicate Al2(OH)6H4SiO4

Journal Article · Sun Jul 01 04:00:00 EDT 1990 · Radiation Research; (USA)

DOI:https://doi.org/10.2307/3577664· OSTI ID:6652066

Nothig-Laslo, V; Horvath, L; Bilinski, H ^[1]

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1. Ruder Boskovic Institute, Zagreb, Croatia (Yugoslavia)

Paramagnetic species which were the products of gamma irradiation at 77 K and at room temperature were studied by ESR spectroscopy in the amorphous aluminosilicate, Al2(OH)6H4SiO4, prepared in the presence and in the absence of oxalate ion. The aluminosilicate precipitated from the solution containing the oxalate ion in 10(-4) mol dm-3 concentration contained the oxalate only in trace amounts. When gamma-irradiated at 77 K and at room temperature, this compound gave the stable paramagnetic species represented by the single ESR line centered at g = 2.000. We ascribe this spectrum to the CO2- radical formed from the oxalate ion. The same aluminosilicate prepared in the absence of the oxalate either produced no stable paramagnetic product after gamma irradiation at room temperature or resulted in composite ESR spectra, indicating the presence of several paramagnetic species if irradiated at 77 K. Complex ESR spectra were transformed by heating to the stable paramagnetic centers which differed from the one obtained from oxalate ion. We conclude that in Al2(OH)6H4SiO4 oxalate acts as a trap for the gamma-radiation energy.

• OSTI ID: 6652066
• Journal Information: Radiation Research; (USA), Journal Name: Radiation Research; (USA) Vol. 123:1; ISSN 0033-7587; ISSN RAREA
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400600* -- Radiation Chemistry
ALUMINIUM COMPOUNDS
ALUMINIUM SILICATES
CARBOXYLIC ACID SALTS
CHEMISTRY
COBALT ISOTOPES
ELECTROMAGNETIC RADIATION
ELECTRON SPIN RESONANCE
GAMMA RADIATION
IONIZING RADIATIONS
ISOTOPES
MAGNETIC RESONANCE
OXALATES
OXYGEN COMPOUNDS
PRECIPITATION
RADIATIONS
RADIOCHEMISTRY
RESONANCE
SEPARATION PROCESSES
SILICATES
SILICON COMPOUNDS
TRAPPING